fix: refine coding project landing actions

tests/unit/coding-project-entry.test.ts

@@ -0,0 +1,33 @@
+import { describe, expect, it, vi } from 'vitest';
+import {
+  requestCodingProjectCreation,
+  requestCodingProjectOpen,
+  subscribeCodingProjectCreationRequest,
+  subscribeCodingProjectOpenRequest,
+} from '@/lib/coding-project-entry';
+
+describe('coding project entry events', () => {
+  it('delivers project creation requests and removes the listener on unsubscribe', () => {
+    const listener = vi.fn();
+    const unsubscribe = subscribeCodingProjectCreationRequest(listener);
+
+    requestCodingProjectCreation();
+    expect(listener).toHaveBeenCalledOnce();
+
+    unsubscribe();
+    requestCodingProjectCreation();
+    expect(listener).toHaveBeenCalledOnce();
+  });
+
+  it('delivers the selected project id and ignores requests after unsubscribe', () => {
+    const listener = vi.fn();
+    const unsubscribe = subscribeCodingProjectOpenRequest(listener);
+
+    requestCodingProjectOpen('project-2');
+    expect(listener).toHaveBeenCalledWith('project-2');
+
+    unsubscribe();
+    requestCodingProjectOpen('project-3');
+    expect(listener).toHaveBeenCalledOnce();
+  });
+});